US4312952A - Fibre glass composition - Google Patents

Fibre glass composition Download PDF

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Publication number
US4312952A
US4312952A US06139423 US13942380A US4312952A US 4312952 A US4312952 A US 4312952A US 06139423 US06139423 US 06139423 US 13942380 A US13942380 A US 13942380A US 4312952 A US4312952 A US 4312952A
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sub
glass
log
temperature
zno
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Expired - Lifetime
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US06139423
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Vlastimil Carbol
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Partek Oy AB
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Partek Oy AB
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    • CCHEMISTRY; METALLURGY
    • C03GLASS; MINERAL OR SLAG WOOL
    • C03CCHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C13/00Fibre or filament compositions

Abstract

A fibre glass composition which is characterized in that it consists of
______________________________________
% by weight______________________________________ SiO2 55-65 Al2 O3 1-2 CaO 6-9.5 MgO 1-4.5 Na2 O 13-17 K2 O 0-2 B2 O3 1-7 BaO 0-3 Li2 O 0-1 Fe2 O3 traces ZnO 0.5-6______________________________________

Description

This invention relates to a glass composition for the production of fibres for glass wool insulations. The glass composition according to the invention is especially suited for the so-called Johns-Manville fibre forming process which utilizes a process equipment incapable of withstanding excessive temperatures.

In the convenional production of such fibres, molten glass is extruded by centrifugal force through the apertures of a rotary spinner. In order to obtain satisfactory fibres, the glass should fulfil certain requirements. Thus, the melting temperature and the fibre forming temperature of the glass must be low, thereby to impart maximum life to the spinner. The melting temperature is indicated as the so-called log 2 temperature, i.e. the temperature at which the 10 log of the viscosity of the glass, measured in poise (or deciPascalsecond, dPas) is 2, while the fibre forming temperature is correspondingly given as the log 3 temperature. If the log 2 and log 3 temperatures can be lowered, this will increase the life of the spinner, and the production stops necessitated by the exchange of the spinners will be less frequent. Already a lowering of the log 2 and log 3 temperatures by five or ten °C. constitutes a considerable improvement. However, a lowering of only the log 2 temperature and the log 3 temperature of the glass is not feasible since the other properties of the glass must also be taken into consideration.

Among the remaining important properties of the glass that must be taken into consideration, is the liquidus temperature, LT, which is the temperature above which no crystallization occurs in the glass. To avoid crystallization of the glass in the spinner, the liquidus temperature must lie at least 50° C. below the log 3 temperature.

Another important property of the glass is its chemical resistance which is measured in accordance with standardized testing methods as the so-called hydrolytical resistance (P value of DGG value).

If it is desired to lower the melting temperature and the fibre forming temperature of the glass, the obvious thing is to increase the content of CaO, Na2 O, K2 O or B2 O3. However, an increase of the CaO content will result in an increase of the liquidus temperature of the glass, with the ensuring risk of crystallization in the spinner. An increased content of Na2 O, K2 O or B2 O3 reduces the chemical resistance of the glass. It will thus be obvious that there is little possibility of changing the composition in conventional manner to obtain improved properties in one respect, without simultaneously deteriorating the properties in some other respect.

The present invention, however, the characteristic features of which are stated in the appended claims, quite surprisingly yields a glass composition having essentially improved properties as compared with standard glass, and this is achieved by incorporating ZnO and preferably also Li2 O in the glass composition.

The invention is based on the fact that there exists between certain atomic types in the glass, such as Zn-Ca and Li-Na-K, a certain anomaly which is of decisive importance to the physical properties of the glass and which depends upon the ion radii of the atoms. To satisfy this anomaly, the difference between the ion radii must be greater than 0.3 A. In order to improve the physical and chemical properties of the glass, this anomaly in the glass structure must be well satisfied, and this means that certain atoms should be included in the glass in a specific interrelationship.

In the light of these circumstances, the present invention proposes incorporating ZnO in the glass, thereby to change the physical and, in particular, the chemical properties of the glass. Furthermore, it is especially preferred to incorporate also from 0 to 1, preferably from 0.1 to 0.4% by weight of Li2 O in the glass, whereby the anomaly is further improved, the viscosity is greatly reduced, and the chemical resistance of the glass is increased.

The fibre glass according to the present invention is characterised by a composition which, based on % by weight, lies within the following general limits:

______________________________________      % by weight______________________________________  SiO.sub.2        55-65  Al.sub.2 O.sub.3        1-2  CaO    6-9.5  MgO    1-4.5  Na.sub.2 O        13-17  K.sub.2 O        0-2  B.sub.2 O.sub.3        1-7  BaO   0-3  Li.sub.2 O        0-1  Fe.sub.2 O.sub.3        traces  ZnO   0.5-6______________________________________

It is especially preferred that the glass composition according to the present invention lie within the following limits:

______________________________________      % by weight______________________________________  SiO.sub.2        58-62  Al.sub.2 O.sub.3        1-2  CaO     8-9.5  MgO   2.3-3.5  Na.sub.2 O        15-17  K.sub.2 O        0-1  B.sub.2 O.sub.3        5-7  BaO   --  Li.sub.2 O        0.1-0.4  Fe.sub.2 O.sub.3        traces  ZnO   1.5-3.5______________________________________

By adding from 0.5 to 6, preferably from 1.5 to 3.5% by weight of ZnO, an excellent chemical resistance of the glass according to the invention is obtained. The chemical resistance was even found to be much better than when the same amount of, for example, titanium dioxide is added to the glass.

Generally, a high proportion of alkali in alkali borosilicate glass greatly reduces the chemical resistance of the glass, but if ZnO is supplied to such glass, the surprising result is that the glass may contain larger amounts of alkali without detriment to the chemical resistance.

The high alkali content, on its part, affects the viscosity of the glass according to the invention so that it will be more readily liquefiable, i.e. the log 2 and log 3 temperatures of the glass are lowered, and this brings a number of practical advantages, such as a lower fibre forming temperature, whereby the life of the fibre forming equipment will be extended and power can be saved. The lower fibre forming temperature also gives a product a higher quality. Furthermore, the glass according to the invention shows a lowering of the liquidus temperature as compared with conventional glass, as a result of which the risk of crystallization of the glass in the spinner is conspicuously reduced or even eliminated. In addition, the glass according to invention has excellent chemical resistance, as will appear from the values of hydrolytical resistance in the following Examples. A further advantage of the present invention is that readily available and inexpensive ZnO-containing starting material may be used. Thus, there is no need to use absolutely pure ZnO as the starting material for the ZnO content of the glass, and any ZnO-containing material can be used.

To illustrate the present invention, the following non-restrictive Examples are given.

EXAMPLES 1-4

Three ZnO-containing glasses according to the present invention were produced. For the purpose of comparison, a conventional alkali borosilicate glass was produced which is used in actual practice and which in the following is referred to as "standard glass".

The compositions of the standard glass and the glass according to the present invention, like the properties of the glasses with respect to log 2, log 3, LT, liquidus viscosity and chemical resistance (Pv SIS 136 321) will appear from Table 1.

              TABLE 1______________________________________    Example 1    (standard glass)               Example 2 Example 3______________________________________OxideSiO.sub.2  63.0         62.6      59.2Al.sub.2 O.sub.3      2.5          1.5       1.5CaO        8.8          9.1       9.1MgO        3.5          3.5       3.5Na.sub.2 O 14.7         15.9      15.9K.sub.2 O  1.0          0.6       0.6B.sub.2 O.sub.3      6.5          6.9       6.9BaO        --           --        --Li.sub.2 O --           0.2       0.2Fe.sub.2 O.sub.3      0.2          0.1       0.1ZnO        --           0.5       3.0log η 2 (°C.)      1270         1200      1187log η 3 (°C.)      1060         997       992L.sub.T (°C.)       960         948       920Liquidusvisc.      3.699        3.353     3.528P.sub.v SIS136232     1.0          1.5       0.9______________________________________

Claims (1)

I claim:
1. A fibre glass composition characterized in that it consists of
______________________________________      by weight______________________________________  SiO.sub.2        58-62  Al.sub.2 O.sub.3        1-2  CaO    8-9.5  MgO   2.5-3.5  Na.sub.2 O        15-17  K.sub.2 O        0-1  B.sub.2 O.sub.3        5-7  BaO   --  Li.sub.2 O        0.1-0.4  Fe.sub.2 O.sub.3        traces  ZnO   1.5-3.5.______________________________________
US06139423 1979-05-09 1980-04-11 Fibre glass composition Expired - Lifetime US4312952A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
SE7904044 1979-05-09
SE7904044A SE418961C (en) 1979-05-09 1979-05-09 Fiberglass Same Seen Ning

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US06281143 Continuation-In-Part US4381347A (en) 1979-05-09 1981-07-07 Fibre glass composition

Publications (1)

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US4312952A true US4312952A (en) 1982-01-26

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US06139423 Expired - Lifetime US4312952A (en) 1979-05-09 1980-04-11 Fibre glass composition

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US (1) US4312952A (en)
EP (1) EP0019600B2 (en)
JP (1) JPS5824385B2 (en)
DE (1) DE3064209D1 (en)
DK (1) DK158896B (en)
FI (1) FI64794C (en)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381347A (en) * 1979-05-09 1983-04-26 Oy Partek Ab Fibre glass composition
US5108957A (en) * 1989-08-11 1992-04-28 Isover Saint-Gobain Glass fibers decomposable in a physiological medium
US5250488A (en) * 1989-08-11 1993-10-05 Sylvie Thelohan Mineral fibers decomposable in a physiological medium
USRE35557E (en) * 1990-06-01 1997-07-08 Isover-Saint Gobain Mineral fibers decomposable in a physiological medium
US5843855A (en) * 1997-01-15 1998-12-01 General Electric Company Glass
US5843856A (en) * 1996-01-24 1998-12-01 General Electric Company Glass composition
US5932347A (en) * 1996-10-31 1999-08-03 Owens Corning Fiberglas Technology, Inc. Mineral fiber compositions
US5962355A (en) * 1996-04-24 1999-10-05 Owens Corning Fiberglas Technology, Inc. Glass compositions having high KI values and fibers therefrom
US6034014A (en) * 1997-08-04 2000-03-07 Owens Corning Fiberglas Technology, Inc. Glass fiber composition
WO2003062164A1 (en) * 2002-01-23 2003-07-31 Paramount Glass Manufacturing Co., Ltd. Glass composition for preparing inorganic fiber, method for production thereof and formed product from the inorganic fiber
US20040015420A1 (en) * 2002-07-18 2004-01-22 Sorrells David F. Networking methods and systems
US6852656B1 (en) * 1999-09-30 2005-02-08 Techint Compagnia Tecnica Internazionale S.P.A. Glass fiber composition
US20080015531A1 (en) * 2006-07-12 2008-01-17 The Procter & Gamble Company Disposable absorbent articles comprising non-biopersistent inorganic vitreous microfibers
US20080161177A1 (en) * 2006-12-27 2008-07-03 Jon Frederick Bauer Novel glass compositions for fiber formation
US20100248928A1 (en) * 2007-10-31 2010-09-30 Saint-Gobain Technical Fabrics Europe Glass strands with low alumina content capable of reinforcing organic and/or inorganic materials
US20120153822A1 (en) * 2009-08-26 2012-06-21 Ocean's King Lighting Science & Technology Co., Ltd. Luminescent element, preparation method thereof and luminescence method
US8536079B2 (en) * 2011-04-29 2013-09-17 Owens Corning Intellectual Capital, Llc Use of boron to reduce the thermal conductivity of unbonded loosefill insulation

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3917045A1 (en) * 1989-05-25 1990-11-29 Bayer Ag Toxicological concern fiberglass
FR2658182B1 (en) * 1990-02-09 1993-11-26 Isover Saint Gobain Glass fibers may be decomposed in a biological medium.
US5055428A (en) * 1990-09-26 1991-10-08 Owens-Corning Fiberglass Corporation Glass fiber compositions
ES2196040T3 (en) * 1993-01-15 2003-12-16 Morgan Crucible Co soluble inorganic fibers in saline solutions.
US5811360A (en) * 1993-01-15 1998-09-22 The Morgan Crucible Company Plc Saline soluble inorganic fibres
US5994247A (en) * 1992-01-17 1999-11-30 The Morgan Crucible Company Plc Saline soluble inorganic fibres
US5928975A (en) * 1995-09-21 1999-07-27 The Morgan Crucible Company,Plc Saline soluble inorganic fibers
DE4417231C3 (en) * 1994-05-17 2000-06-29 Gruenzweig & Hartmann Use of a composition as a material for biodegradable mineral fibers
DE4447576A1 (en) 1994-05-28 1996-05-09 Gruenzweig & Hartmann Alkali and boron oxide-rich glass fibre compsn.
DE9410833U1 (en) * 1994-06-03 1994-10-13 Deschler Anton Protective device for a jerrycan
GB9508683D0 (en) * 1994-08-02 1995-06-14 Morgan Crucible Co Inorganic fibres
US5523265A (en) * 1995-05-04 1996-06-04 Owens-Corning Fiberglas Technology, Inc. Glass compositions and fibers therefrom
FR2781788B1 (en) * 1998-08-03 2001-08-10 Saint Gobain Isover mineral wool composition
GB2341607B (en) 1998-09-15 2000-07-19 Morgan Crucible Co Bonded fibrous materials
CA2344428A1 (en) * 1998-09-18 2000-03-30 Owens Corning Glass fibers with improved durability via low mgo and al2o3
ES2163972B1 (en) * 1999-04-30 2003-06-16 Poliglas Sa Biosoluble composition of glass fibers for the production of glass wools and the like.
GB2383793B (en) 2002-01-04 2003-11-19 Morgan Crucible Co Saline soluble inorganic fibres
US7875566B2 (en) 2004-11-01 2011-01-25 The Morgan Crucible Company Plc Modification of alkaline earth silicate fibres
WO2018052150A1 (en) * 2016-09-16 2018-03-22 マグ・イゾベール株式会社 Glass wool, and vacuum heat insulation material using same

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877124A (en) * 1955-11-25 1959-03-10 Owens Corning Fiberglass Corp Glass composition
US3095311A (en) * 1960-06-29 1963-06-25 Von Wranau Glass compositions
US4177077A (en) * 1977-10-31 1979-12-04 Johns-Manville Corporation Glass composition for fiberization

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA998696A (en) * 1972-12-13 1976-10-19 Ralph L. Tiede Glass compositions
JPS5417338B2 (en) * 1975-08-25 1979-06-29
JPS5849501B2 (en) * 1976-06-29 1983-11-04 Asahi Glass Co Ltd

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2877124A (en) * 1955-11-25 1959-03-10 Owens Corning Fiberglass Corp Glass composition
US3095311A (en) * 1960-06-29 1963-06-25 Von Wranau Glass compositions
US4177077A (en) * 1977-10-31 1979-12-04 Johns-Manville Corporation Glass composition for fiberization

Cited By (26)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4381347A (en) * 1979-05-09 1983-04-26 Oy Partek Ab Fibre glass composition
US5108957A (en) * 1989-08-11 1992-04-28 Isover Saint-Gobain Glass fibers decomposable in a physiological medium
US5250488A (en) * 1989-08-11 1993-10-05 Sylvie Thelohan Mineral fibers decomposable in a physiological medium
USRE35557E (en) * 1990-06-01 1997-07-08 Isover-Saint Gobain Mineral fibers decomposable in a physiological medium
US5843856A (en) * 1996-01-24 1998-12-01 General Electric Company Glass composition
US5962355A (en) * 1996-04-24 1999-10-05 Owens Corning Fiberglas Technology, Inc. Glass compositions having high KI values and fibers therefrom
US5932347A (en) * 1996-10-31 1999-08-03 Owens Corning Fiberglas Technology, Inc. Mineral fiber compositions
US5843855A (en) * 1997-01-15 1998-12-01 General Electric Company Glass
US6034014A (en) * 1997-08-04 2000-03-07 Owens Corning Fiberglas Technology, Inc. Glass fiber composition
US6852656B1 (en) * 1999-09-30 2005-02-08 Techint Compagnia Tecnica Internazionale S.P.A. Glass fiber composition
EP1218304B2 (en) 1999-09-30 2016-11-16 STM Technologies S.r.l. A glass fiber composition
US20050079970A1 (en) * 2002-01-23 2005-04-14 Keiji Otaki Glass composition to be used for manufacturing inorganic fiber, method of manufacturing the same and molded product of inorganic fiber
WO2003062164A1 (en) * 2002-01-23 2003-07-31 Paramount Glass Manufacturing Co., Ltd. Glass composition for preparing inorganic fiber, method for production thereof and formed product from the inorganic fiber
US20040015420A1 (en) * 2002-07-18 2004-01-22 Sorrells David F. Networking methods and systems
WO2008010123A2 (en) * 2006-07-12 2008-01-24 The Procter & Gamble Company Disposable absorbent articles comprising non-biopersistent inorganic vitreous microfibers
WO2008010123A3 (en) * 2006-07-12 2008-05-02 Bryn Hird Disposable absorbent articles comprising non-biopersistent inorganic vitreous microfibers
US8198505B2 (en) 2006-07-12 2012-06-12 The Procter & Gamble Company Disposable absorbent articles comprising non-biopersistent inorganic vitreous microfibers
US20080015531A1 (en) * 2006-07-12 2008-01-17 The Procter & Gamble Company Disposable absorbent articles comprising non-biopersistent inorganic vitreous microfibers
US20080161177A1 (en) * 2006-12-27 2008-07-03 Jon Frederick Bauer Novel glass compositions for fiber formation
US7763558B2 (en) * 2006-12-27 2010-07-27 Johns Manville Glass compositions for fiber formation
US8367571B2 (en) * 2007-10-31 2013-02-05 Saint-Gobain Technical Fabrics Europe Glass strands with low alumina content capable of reinforcing organic and/or inorganic materials
US20100248928A1 (en) * 2007-10-31 2010-09-30 Saint-Gobain Technical Fabrics Europe Glass strands with low alumina content capable of reinforcing organic and/or inorganic materials
US20120153822A1 (en) * 2009-08-26 2012-06-21 Ocean's King Lighting Science & Technology Co., Ltd. Luminescent element, preparation method thereof and luminescence method
US9000667B2 (en) * 2009-08-26 2015-04-07 Ocean's King Lighting Science & Technology Co., Ltd. Luminescent element, preparation method thereof and luminescence method
US8536079B2 (en) * 2011-04-29 2013-09-17 Owens Corning Intellectual Capital, Llc Use of boron to reduce the thermal conductivity of unbonded loosefill insulation
US9523190B2 (en) 2011-04-29 2016-12-20 Owens Corning Intellectual Capital, Llc Use of boron to reduce the thermal conductivity of unbonded loosefill insulation

Also Published As

Publication number Publication date Type
JPS5824385B2 (en) 1983-05-20 grant
EP0019600A2 (en) 1980-11-26 application
FI64794C (en) 1984-01-10 grant
JPS5614450A (en) 1981-02-12 application
FI801187A (en) 1980-11-10 application
DE3064209D1 (en) 1983-08-25 grant
FI64794B (en) 1983-09-30 application
EP0019600B1 (en) 1983-07-20 grant
DK190880A (en) 1980-11-10 application
EP0019600A3 (en) 1981-05-20 application
DK158896B (en) 1990-07-30 grant
EP0019600B2 (en) 1989-06-07 grant

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